An optical line termination (OLT), also called an optical line terminal, is a device which serves as the service provider endpoint of a passive optical network.
4G WiFi Router S-4G1LW3 ... The device has Multi-interface and 4G LTE full frequency bands. It is basic on LTE CAT4 standard, inner WIFI and Ethernet
A telephone distribution box (DB) is a device that connects and distributes cables for telephone networks. They are used in both small and large-scale network installations. Here are some features of a telephone DB box